added readme details

README.md

 gitter-env
 ==========
-gitter-env
+Deploying your node app? Use this to:
+1) stop your app from crashing when redis fails over
+2) keep servers alive by rotating logs
+3) publish errors that wake people up in the night
+4) publish stats that help make decisions
+5) use different env configs so that you app can travel to new environments